// NB: Once we uninstall the old version of the app, we try to schedule
// it to be deleted at next reboot. Unfortunately, depending on whether
// the user has admin permissions, this can fail. So as a failsafe,
// before we try to apply any update, we assume previous versions in the
// directory are "dead" (i.e. already uninstalled, but not deleted), and
// we blow them away. This is to make sure that we don't attempt to run
// an uninstaller on an already-uninstalled version.
async Task cleanDeadVersions(SemanticVersion currentVersion, SemanticVersion newVersion, bool forceUninstall = false)
{
if (newVersion == null)
{
return;
}
var di = new DirectoryInfo(rootAppDirectory);
if (!di.Exists)
{
return;
}
this.Log().Info("cleanDeadVersions: checking for version {0}", newVersion);
string currentVersionFolder = null;
if (currentVersion != null)
{
currentVersionFolder = getDirectoryForRelease(currentVersion).Name;
this.Log().Info("cleanDeadVersions: exclude current version folder {0}", currentVersionFolder);
}
string newVersionFolder = null;
if (newVersion != null)
{
newVersionFolder = getDirectoryForRelease(newVersion).Name;
this.Log().Info("cleanDeadVersions: exclude new version folder {0}", newVersionFolder);
}
// NB: If we try to access a directory that has already been
// scheduled for deletion by MoveFileEx it throws what seems like
// NT's only error code, ERROR_ACCESS_DENIED. Squelch errors that
// come from here.
var toCleanup = di.GetDirectories()
.Where(x => x.Name.ToLowerInvariant().Contains("app-"))
.Where(x => x.Name != newVersionFolder && x.Name != currentVersionFolder)
.Where(x => !isAppFolderDead(x.FullName));
if (forceUninstall == false)
{
await toCleanup.ForEachAsync(async x => {
var squirrelApps = SquirrelAwareExecutableDetector.GetAllSquirrelAwareApps(x.FullName);
var args = String.Format("--squirrel-obsolete {0}", x.Name.Replace("app-", ""));
if (squirrelApps.Count > 0)
{
// For each app, run the install command in-order and wait
await squirrelApps.ForEachAsync(async exe => {
using (var cts = new CancellationTokenSource()) {
cts.CancelAfter(10 * 1000);
try {
await Utility.InvokeProcessAsync(exe, args, cts.Token);
} catch (Exception ex) {
this.Log().ErrorException("Coudln't run Squirrel hook, continuing: " + exe, ex);
}
}
}, 1 /* at a time */);
}
});
}
// Include dead folders in folders to :fire:
toCleanup = di.GetDirectories()
.Where(x => x.Name.ToLowerInvariant().Contains("app-"))
.Where(x => x.Name != newVersionFolder && x.Name != currentVersionFolder);
// Get the current process list in an attempt to not burn
// directories which have running processes
var runningProcesses = UnsafeUtility.EnumerateProcesses();
// Finally, clean up the app-X.Y.Z directories
await toCleanup.ForEachAsync(async x => {
try {
if (runningProcesses.All(p => p.Item1 == null || !p.Item1.StartsWith(x.FullName, StringComparison.OrdinalIgnoreCase)))
{
await Utility.DeleteDirectoryOrJustGiveUp(x.FullName);
}
if (Directory.Exists(x.FullName))
{
// NB: If we cannot clean up a directory, we need to make
// sure that anyone finding it later won't attempt to run
// Squirrel events on it. We'll mark it with a .dead file
markAppFolderAsDead(x.FullName);
}
} catch (UnauthorizedAccessException ex) {
this.Log().WarnException("Couldn't delete directory: " + x.FullName, ex);
// NB: Same deal as above
markAppFolderAsDead(x.FullName);
}
});
// Clean up the packages directory too
var releasesFile = Utility.LocalReleaseFileForAppDir(rootAppDirectory);
var entries = ReleaseEntry.ParseReleaseFile(File.ReadAllText(releasesFile, Encoding.UTF8));
var pkgDir = Utility.PackageDirectoryForAppDir(rootAppDirectory);
var releaseEntry = default(ReleaseEntry);
foreach (var entry in entries)
{
if (entry.Version == newVersion)
{
releaseEntry = ReleaseEntry.GenerateFromFile(Path.Combine(pkgDir, entry.Filename));
continue;
}
File.Delete(Path.Combine(pkgDir, entry.Filename));
}
ReleaseEntry.WriteReleaseFile(new[] { releaseEntry }, releasesFile);
}
public int KillAllProcessesBelongingToPackage()
{
var ourExe = Assembly.GetEntryAssembly();
var ourExePath = ourExe != null ? ourExe.Location : null;
List <Tuple <string, int> > running = null;
running = UnsafeUtility.EnumerateProcesses()
.Where(x =>
{
// Processes we can't query will have an empty process name, we can't kill them
// anyways
if (String.IsNullOrWhiteSpace(x.Item1))
{
return(false);
}
// Files that aren't in our root app directory are untouched
if (!x.Item1.StartsWith(rootAppDirectory, StringComparison.OrdinalIgnoreCase))
{
return(false);
}
// Never kill our own EXE
if (ourExePath != null && x.Item1.Equals(ourExePath, StringComparison.OrdinalIgnoreCase))
{
return(false);
}
var name = Path.GetFileName(x.Item1).ToLowerInvariant();
if (name == "squirrel.exe" || name == "update.exe")
{
return(false);
}
return(true);
}).ToList();
running.Sort((Tuple <string, int> p1, Tuple <string, int> p2) =>
{
if (p1.Item1 == default)
{
return(p2.Item1 == default ? -1 : 0);
}
if (p2.Item1 == default)
{
return(1);
}
var p1Parent = UnsafeUtility.GetParentProcessId(p1.Item2);
var p2Parent = UnsafeUtility.GetParentProcessId(p2.Item2);
if (p1Parent == -1 && p2Parent == -1)
{
return(0);
}
// no parent is higher.
if (p1Parent == -1)
{
return(1);
}
if (p2Parent == -1)
{
return(-1);
}
// direct relationships
if (p1.Item2 == p2Parent)
{
return(1);
}
if (p2.Item2 == p1Parent)
{
return(-1);
}
// don't care
return(0);
});
running.ForEach(x =>
{
try
{
this.WarnIfThrows(() => Process.GetProcessById(x.Item2).Kill());
}
catch { }
});
return(running.Count);
}
